A New Procedure for the Routine Assessment of Paper Diagonal Curl

Abstract

Diagonal curl can lead to severe problems for end users, such as frequent jams during copy or printing. We reviewed the key factors underlying paper curl and diagonal curl and presented a new measurement method for assessing diagonal curl. The methodology overcomes most of the limitations of current methods that have prevented them from being adopted for routine testing purposes. The methodology is already being implemented in a paper mill and is providing new elements for data analysis and adding previously unavailable information to process/quality databases. In runnability tests, diagonal curl measurements were found to correlate well with the occurrence of paper jams.